package com.wally.netty.server;


import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import lombok.extern.slf4j.Slf4j;




@Slf4j
public class TimeServer {

	public void bind(int port) throws Exception {
		// 配置服务端的NIO线程组
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workerGroup = new NioEventLoopGroup();
		try {
			ServerBootstrap b = new ServerBootstrap();// Netty用于启动NIO服务端的辅助启动类
			b.group(bossGroup, workerGroup)
				.channel(NioServerSocketChannel.class)
				.option(ChannelOption.SO_BACKLOG, 1024)// 配置NioServerSocketChannel的TCP参数
				.childHandler(new ChildChannelHandler());
			// 绑定端口，同步等待成功
			ChannelFuture f = b.bind(port).sync();

			// 等待服务端监听端口关闭,main函数退出
			f.channel().closeFuture().sync();
		} finally {
			// 优雅退出，释放线程池资源
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}

	private class ChildChannelHandler extends ChannelInitializer<SocketChannel> {

		@Override
		protected void initChannel(SocketChannel arg0) throws Exception {
			arg0.pipeline().addLast(new TimeServerHandler());
		}
	}
	
	
	
	
	
	public static void main(String[] args) throws Exception {
		int port = 8080;
		if (args != null && args.length > 0) {
			try {
				port = Integer.valueOf(port);
			} catch (NumberFormatException e) {
				log.error("异常：{}", e);
			}
		}
		new TimeServer().bind(port);
	}
}




